Want to use video call but can’t get it to works because of iPhone WiFi limitation. You will want to give the application Fring a try. It is not as polish as Facetime but at least it works. However you can only video chat with another user. It works reasonable well on AT&T 3G networks but running it off 3G will be expensive unless you have the unlimited data plan.
Another limitation is you can’t have a video chat wi th SkyPe user right now because of a FLAME war going on between Fring and Skype. Fring also support most of the IM standard like Goole, MSN and Yahoo; which is nice.
Fring is not very well polish and one of the part I hate the most is you can’t delete any “buddy” off its address book. Hopefully it will get address in some upcoming release.